Engraving machine



" qul zs, 1925.

. YE. F. TUTTL E, JR

ENGRAVING MACHINE Filed April '11; 1921 2 1 Eugene f5 Eff/e 17;?

July 28, 1925. 1,547;847"

E. F. TUTTLE, JR

ENGRAVING MACHINE 7 Filed April 11. 1921 2 Sheefgii-Sheet 2 fags/7e f Eff/e JZ' Patented July 28, 1925.

UNITED STATES PATENT OFFICE.

' .ENGRAVING' MACHINE.

Application filed. April 11, 1921. Serial No. 460,400.

To all whom it may concern:

Be it known that I, EUGENE F. TUTTLE, J r., a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Engraving Ma chines, of which the followingis a specification. i

It is the object of this invention to provide an engraving machine which is adapted to produce lines in any predetermined relative position and of any predetermined curvature.

More particularly the invention comprises a mechanism carrying a stylus and arranged when actuated to combine any predetermined longitudinal movement of the apparatus with a predetermined transverse movement thereof so that a line of any desired wave form is produced. Relative adjustmentof the longitudinal and transversemotionsof the apparatus will produce desired variations in the amplitude and length of the Wave form. p

The invention also provides means for producing a series of'lines of the desired wave form, the mechanism being arranged to vary the transverse spacing of said lines as well as the longitudinal spacing of the same in order to produce a desired ornamental de- The invention also provides means for stopping the transverse shifting of the apparatus at an intermediate'point and while the longitudinal movement of the apparatus continues, in order that a wave form may be produced in which the peaks of the wave are cut off as desired in order to varythe design. The'invention further provides for eccentric rotation of the stylus during movement thereof in order to produce still further variations in the design by the provision of looped lines. v 1

It will be understood that the provision of adjusting means for each of the various movements which the stylus may be caused to make, provides means whereby a wide variation in the contour of the lines produced is made possible, and as a consequence the operator, through relative movement of the various adjustin means, may cause a greater variation in designs to be produced so as to create any one of a large number of ornamental effects.

The. invention will be readily understood from the following description of the accompanying drawings, in which'- Figure 1 is a plan view of an apparatus constructedin accordance with the invention. 1

Fig. 2 is a p'lanview of the carriage showing the under side of the same. i

Fig. 3 is a transverse section on the line 33 of Fig. 1.

Fig. 4 is a detail section on the. line H of Fig. 3. r

Fi 5'shows various Wave forms which may e produced by the machine with mm tions in the amplitude of said waves.

Fig. 6 is a similar view showing possible variations in the wave lengths.

Fig.7 shows a wave form produced by the machine with the peaks of'the waves cut off. I I

Fig. 8 shows a plurality 'of transversely spaced similar wave forms produced by the machine. I

Fig. 9 shows a plurality of wave forms produced with said wave forms longitudinally spaced.

Fig. '10 shows a possible cycloid wave produced by the apparatus.

Fig. 11 shows preferred details of a means for positioning the stylus as hereinafter described.

' Tlieiimproved apparatus includes a suitable b'ase 1 carrying asheet or plate which is to be engraved, and a suitable rectangular frame 2 is mounted upon said base and is provided at opposite sides with guides 3 and l for the movable carriage of the apparatus. The guide 3 is preferably provided with a flat upper surface having the movable carriage resting upon the same, while the upper surface of guide 4 is preferably a wedge-shaped tongue 5 adapted to be engaged by a corresponding wedge-shaped groove 6 in the carriage, in order that the latter will be positively transversely positioned with relation to the stationary frame as it is moved back and forth alongthe same.

The movable carriage comprises a trans verse plate. 7 having depending end members 8 which rest upon guides 3 and 4. Transverse guideways 9 areprovided' at the respective ends of the under side of plate 7, and a bar is shiftable transversely of the apparatus by being mounted at its respective ends in said guideways. The engaging surfaces of bar and the grooves of the guideways are undercut, as shown at 11 in order that the bar will be held in said guideways while permitting of reciprocation of ratus,'and said arm is swung back and forth upon its pivot by a block 18 slidable in a guideway 19 formed in a block 20, the guideway 19 extending lengthwise of plate 7 and transversely of the apparatus. Block 20 is in turn slidable in a guideway 21 extending lengthwise of the apparatus and mounted upon plate 7, and the adjustment of block 20is accomplished by a threaded bolt 22 threaded through a lug 23 upon the plate 7 and swiveled to the block 20. Bolt 22 may be provided with a knurled head 22 which co-operates with a graduated member 22 shown as extending from lug 23 in order that the block 20 may be accurately adjusted in its guideways.

Reciprocation of block 18 in its guideway is accomplished through an arm 25 abutting against said block intermediate of its ends and pivoted as shown at 26 to plate 7 so as to extend'lengthwise of the apparatus. The arm 25 is swung toward block 18 for shifting the same in one direction by means of a suitable cam mechanism to be described, and the return movement of said arm may be adjusted as by -means of a set screw 27 threaded through a lug 28 upon plate 7 and adapted to have the swinging end of arm 25 abut against the same. Lug 28 is preferably provided with a graduated extension 29 in order that by setting the knurled head 30' of the set screw with relation to said graduations, the position of the limiting means for the return swing of arm 25 may be accurately adjusted.

. Arm 25 is swung toward block 18 by mechanism impinging against said arm intermediate of its ends, and in the present exemplification of the invention this actuating mechanism is shown as a cam, although it will be apparent that a suitable eccentric operating means might be provided for swinging the arm.

The cam mechanism includes a shaft 32 journaled in plate 7 and adapted to have a suitable cam disc '33 removably mounted upon the upper endof said shaft and in position to engage arm 25. A crank handle 34 may be mounted upon the end of shaft 32 projecting above the cam with said crank handle and cam fixed to the shaft by a usual retaining nut 35 in order that by removing said nut and crank handle, any one of a plurality of various cam discs may be employed in connection with the rotatable shaft. The peripheryof'the cam disc may be provided with any number of cam surfaces 33 of suitable design and arranged to cause arm 25 to be swung transversely of the apparatus in one direction during each rotation of shaft 32.

The swinging movement of arm 25 will be transmitted, as previously described, to bar 10 so as to shift the same transversely of the mechanism in one direction, and between each such shifting movement of said bar, it is automatically returned to its first position as by means of a suitable coil spring 40 atthe under side of the carriage and connected at its respective ends to the bar and to the carriage frame. It will thus be seen that rotation ofshaft 32 will cause reciprocation of bar 10 transversely of the apparatus.

It will be understood that the number of reciprocations of bar 10, during each rotation of shaft 32 and the lengths of said reciprocations, may be primarily varied by employing cam discs 33 with various cam surfaces. A still further variation in the length of the reciprocations of the bar 10 is accomplished by shifting block 20 in its guideways in order to vary the leverage of the connection between arms 25 and 16.

The transversely extending carriage of the apparatus is adapted to be longitudinally shifted while bar 10 is reciprocated as above described, and for this purpose a gear 45 is fixed upon shaft 32 and meshes with an idler 46 meshing in turn with a gear 47 fixed upon a shaft 48 journ'aled-in plate 7. Gear 47 and the idler 46 arereadily removable so that any desired gear and idler may be employed in the apparatus in order to obtain any desired speed ratio between shafts 32 and 48. The shaft 48 extends below the car'- riage of the apparatus and is provided with a worm 49 mes ing with a screw 50'extending lengthwise of the frame of the apparatus and suitably sup orted thereby. By this arrangement it wi 1 be seen that turning of crank handle 34 will cause not only transverse reciprocation of bar 10, but also longitudinal movement of the carriage. of the apparatus, and it will be noted that the various adjustments provided make possible any desired relation between the, longitudinal movement of the carriage and the transverse reciprocations of bar 10 carried by the same. I

While I have shown the mechanism as manually operated by turning crank handle 34, it will be readily'apparent that a suitable power drive might be provided' for shaft 32. r

A stylus is carried by reciprocating bar 10 and depends therefrom so as to engage the work mounted upon base 1. This stylus is so arranged that its position with relation to bar 10 may be transversely shifted across the apparatus in order that a plurality of transversely spaced lines may be formed by the stylus along the length of the work upon base 1 at succeeding movement of the carriage along its frame.

As an instance of this arrangement, bar 10 is provided with a longitudinal bore 50", and a threaded rod 51 extends through said bore and is j ournaled in plate 7. V The end of the rod projects beyond the carriage of the apparatus at one end and is provided with a suitable handle 52 for rotating the same, said handle being provided with an indicator 53 adapted to co-operate with a graduated dial 54 so that the rotation of rod 51 may be accurately adjusted. Dial 54 is provided with a hub portion that is secured to the adjacent part of the frame of the machine, and shaft 51 extends through this hub portion. A block 55 is threaded upon rod 51, as shown at 56*, so that by turning handle 52, said block may be adjusted to any desired position along the length of bar 10 while causing the reciprocation of said block with said bar.

A rotatable shaft 56 depends from block 55 and is provided at its lower end with a plate 57 (see Fig. 11) forming a transverse guideway 58. A block 59 is slidable in said guideway and a rod 60 depends from the same with a suitable stylus 61 at the lower end of said rod and engaging the work upon base 1. The stylus rod and block 59 may be shifted in guideway 58 soas to eccentrically position the stylus with relation to rotatable shaft 56, and for this purpose a threaded rod 62 is threaded through stylus rod 60, said threaded rod'being journaled in bearing lugs 68 depending from plate 57. The threaded rod is provided with a suitable operating head 64, and a scale for adjusting the eccentric positioning of the stylus rod is preferably provided, said scale being shown as a graduated member 65 upon the plate 57 and co-operating with an indicator66 upon block 59.

The means employed for rotating shaft 56 shown as adapted to rotate on a Vertical axis comprises a worm 68 upon the shaft 32 and meshing with a worm gear 69 upon a countershaft 7O journaled lengthwise of plate 7 at the under side of the same. A second countershaft 71 is similarly journaled lengthwise of plate 7 at its under side, and this latter shaft is provided with a spiral gear 72 fixed for rotation with shaft 71 and movable along the same as by pro-- viding the shaft with a longitudinal slot 73 and the-gear with a corresponding key. The

spiral gear 72 is moved transversely of the apparatus with block 55 as by being j ournaled in a suitable bracket 74 projecting from said block. The gear meshes with a spiral gear 75 fixed upon-shaft 56 so that rotation of shaft 71 will cause rotation of the stylus rod, as previously described, and

the stylus rod is adapted to be adjustably eccentrically rotated.

The driving connection from crank handle 34 to the stylus rod includes a gear 76 fixed upon shaft 71' and a gear 77 positioned upon shaft 70 and slidable longitudinally thereof for engagement or disengagement with gear 76. For this purpose gear 77 may be keyed upon shaft 70, as shown at 79, and the gear may be held in meshing or nonmeshing position by means of a suitable set screw 78 adapted to engage the shaft. It will thus be seen that during the operation of the mechanism, the stylus rod may remain in nonrotatable engagement with the work, or said stylus rod may be eccentrically rotated as desired.

The mechanism, as thus far described, is adapted to cause co-operating longitudinal movement of the carriage and transverse reciprocation of the stylus carrying mech anism. The apparatus is also provided with means for longitudinally shifting saidcooperating related movements of the machine. F or this purpose screw 50 is provided with an actuating handle 82 projecting beyond the frame of the machine, so that said screw may be readily rotated and thereby cause successive compound movements of the stylus along the work to start at'points lon gitudmally shifted one beyond another.

The handle 82 is preferably provided with an indicator 88 co-operatmg with a gradu- I ated scale 84 carried by the frame of the machine so that the solid longitudinal'shiftings may be accurately'adjusted.

In operation it will be seen that the combined longitudinal movement of the carriage of the machine and the rhythmically I repeated reciprocations of the stylus carrying means will cause the stylus to trace a wave form across the work. As a result a design, such as shown at a in Fig. 5, may be engraved by the machine. By varying the cam disc 33 employed in the machine, the shape of this wave form may be varied, and in similar manner by varylng the connection between arms 25 and 16 through adjustment of threaded rod 22, the amplitude of the waves of the design may be varied so as to produce a wave form, such as shown at b in Fig. 5. 1

In similar manner it will be seen that by. varying the gearing between shaft 82 and shaft 48 that the length of the waves of the design maybe varied as shown at aand b in Fig. 6. It will also be understood that thesevariationsof wave amplitude' and length may be combined so as to afford a still greater variation 1n the designs which may be made by the machine.

'disc 33. As a result it willbe noted that arm 25 will swing its full distance in one direction, as caused by the abutment of the cam disc, but the return swing of said arm will be limited so that an intermittent reciprocation of the stylus with relation to its longitudinal movement is caused. As will be readily understood, such a movement will cause a wave to be traced having the peaks at one side thereof cut off. It will also be apparent that the cut oif portion of the wave peaks may be varied through adjustment of the screw rod 27. In similar manner it will be understood that this last adjustment of the machine may be employed in connection with the adjustments for variation in wave amplitude and length so as to increase the variation in designs which may be traced by the machine.

A wave length, of the desired contour, having been traced by one movement of the carriage across the work, said wave length may be indefinitely repeated, either at transversely spaced points across the work, as shown in Fig. 8, or at longitudinally spaced points upon the work, as shown in Fig. 9. By turning handle 52, the wave lengths will be traced in transversely spaced relation, while actuation of handle 82 will cause a similar longitudinal shifting of the compound movement of the stylus during successive movements thereof along the work. It will be understood that by setting these handles to the desired positions that any required transverse or longitudinal spacing of the wave length tracings'may be made. The variety of designs which it is possible to make with the machine is thus still further increased.

The tracings, as thus far described, have been made with gears 76-77 disconnected so that the stylus rod is not rotated, but by causing the said gears to mesh, the movement of the stylus, as previously described, may be combined with a rotatable movement of said stylus. If screw bolt 62 is so adjusted as to concentrically position stylus rod 60 with relation to shaft 56, no further variation in the design traced is produced, but as soon as the stylus rod is adjusted to various eccentric positions, the compound movement of the stylus across the work, as previously described, is combined with a circle tracing movement of the stylus so that a looped, or cycloid design, such as shown in Fig. 10, is traced.

It will, of course, be understood that adjustment of the eccentric positioning of the stylus rod will cause variations in the cycloid design, and that such an adjustment,

when combined with any or all of the previously described adjustments of the machine, will produce a still further variation in the designs which may be traced.

Various changes may be made without departing, from the spirit of the invention as claimed.

What is claimed is:

1. An engraving machine comprising an elongated carriage, a stylus support mounted on the carriage and adapted to be rotated on a vertical axis, a stylus rod carried by the support and eccentrically rotatable relative to the axis of said support, a screw mounted longitudinally on the carriage and a worm engaging the screw and adapted to move the carriage rectilinearly, a cam adapted to reciprocate the stylus support transversely'of the rectilinear movement of the carriage, a gear adapted to rotate the stylus rod, and intermediary shafts and gears adapted to correlate the movement of the worm and the gear on the stylus rod with the movement of the cam.

2. An engraving machine comprising an elongated carriage, a stylus support mounted on the carriage and adapted to be rotated on a vertical axis, a stylus rod carried by the support and eccentrically rotatable relative to the axis of said support, screw means for adjusting the eccentricity of the stylus rod upon the support, a screw mounted longitudinally on the carriage and a worm engaging the screw and adapted to move the carriage rectilinearly, a cam adapted to reciprocate the stylus support transversely of the rectilinear movement of the carriage, a gear adapted to rotate the stylus rod, and intermediary shafts and gears adapted to correlate the movement of the worm and the gear on the stylus rod with the movement of the cam.

3. An engraving machine comprising an elongated carriage, a stylus support mounted on the carriage and adapted to be rotated on a vertical axis, a stylus rod carried by the support and eccentrically rotatable relative to the axis of said support, a screw mounted longitudinally on the carriage and a worm engaging'the screw and adapted to move the carriage rectilinearly, a cam adapted to reciprocate the stylus support transversely of the rectilinear movement of the carriage, a gear adapted to rotate the stylus rod, intermediary shafts and gears adapted to correlate the movement of the worm and the gear on the stylus rod with the movement of the cam, means for adjusting the reciprocation of the stylus support comprising an arm pivoted at one end to the carriage and adapted to be actuated by the cam, a second arm substantially parallel to the first arm and pivoted at its opposite end, a block slidably mounted between the arms, a vertical arm adapted to reciprocate 111 a slot formed in the top of the carriage, said vertical arm carrying the stylus support, and screw means for adjusting the position of the arms and the block.

4. An engraving machine comprising an elongated carriage, a stylus support mounted on the carriage and adapted to be rotated on a vertical axis, a stylus rod carried by the support and eccentrically rotatable relative to the axis of said support, a screw mounted longitudinally on the carriage and a Worm engaging the screw and adapted to move the carriage rectilinearly, a cam adapted to reciprocate the stylus support transversely of the rectilinear movement out the carriage a gear adapted to rotate the stylus rod, intermediary shafts and gears adapted to correlate the movement of the Worm and the gear on the stylus rod With the movement of the cam, and interchangeable cams and gears for changing the reciprocation of the stylus and the rectilinear movement of the carriage.

In testimony whereof I have signed my name to this specification.

EUGENE F. TUTTLE, J 1%. 

